 | | crystals and voltage monitors
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Hi. Does anyone have current part numbers/vendors for the 8MHZ crystal and the U12 Voltage Monitor on the Handy Board? Are the correct values available from digi-key? I saw they carry both crystals and voltage monitors, I just don't want to order (...) (26 years ago, 10-Mar-99, to lugnet.robotics.handyboard)
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| | Vision on the Handy Board?
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Has anyone tried to connect some sort of a camera to the HB? Would I be asking too much of the 6811 processor to do some simple pattern recognition? I was just curious to what extent I could push my board to. Thanks for any info! Bill Denzel Senior (...) (26 years ago, 10-Mar-99, to lugnet.robotics.handyboard)
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| | Re: HB v1.2, IC v3.1 and ir functionality
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Dear Edward, I don't think you need the r22_ir.lis file.The file sony_ir.icb is available at (URL) . Yours sincerely, Nitin (...) (26 years ago, 9-Mar-99, to lugnet.robotics.handyboard)
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| | Re: basic trigonometric functions on the handyboard..
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Dear Berg, You can perhaps express cos^-1 in the forms of a Taylor series and use that series for finding the approximate value. I have however not tried it. There is no math function for inverse cosine.Refer to handy board manual available (...) (26 years ago, 9-Mar-99, to lugnet.robotics.handyboard)
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| | Re: basic trigonometric functions on the handyboard..
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A Taylor series isn't the way to go: they converge far too slowly. Here is a polynomial fit to arccos(x): arccos(x) ~ = 1.5708 - 1.0927 x + 4.358 x^3 - 0.8340 x^5 It differs from the exact value of arccos(x) by no more that 0.08 radians (4.6 (...) (26 years ago, 9-Mar-99, to lugnet.robotics.handyboard)
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| | Re: basic trigonometric functions on the handyboard..
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The attached GIF shows the Taylor series of the arcsin and arccos. arctan=arccos/arcsin. I haven't tried to implement these formulas on a 68HC11. 3 to 4 steps are quite precise already. Jeroen van der Vegt. -----Original Message----- From: Raymond, (...) (26 years ago, 9-Mar-99, to lugnet.robotics.handyboard)
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| | Re: basic trigonometric functions on the handyboard..
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Hi, The taylor for cos^-1 goes: cos^-1(x) = Pi/2- (x + 1/2*x^3/3 + 1/2*3/4*x^5/5 + 1/2*3/4*5/6*x^7/7 ...) (which in fact is simply Pi/2 - sin^-1) The results are very good for small x. For x close to 1 you need many many elements of that series to (...) (26 years ago, 9-Mar-99, to lugnet.robotics.handyboard)
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| | Polaroid Sonar
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Hi all, I don't know the Polaroid Sonar.... Do you have photo of it. Do you have schematics.... Thanks Dperonne@aol.com (26 years ago, 9-Mar-99, to lugnet.robotics.handyboard)
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| | Serial routines for PA7 at 2400 Baud
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Hi, I read somewhere taht if i want to use pa7 with 2400 baud that i'll have to modify the LDAB 37 to LDAB 148. Is this the only change ?? If i try to use this, and i send 0b11111111 on the HB, I get 0b11000000 on the Host (if i try 0b00000000 i get (...) (26 years ago, 9-Mar-99, to lugnet.robotics.handyboard)
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| | Help!
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Hello Everyone! I have a problem with my Handyboard. Until last week everything was ok, but now.. At the moment I can put the Handyboard in bootstrap mode,and download pcode. But I do not get the Interactive C message and the beep! So I guess is a (...) (26 years ago, 9-Mar-99, to lugnet.robotics.handyboard)
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| | 20 X 4 L.C.D Screen?
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I put in an e-mail yesterday about using a different L.C.D, I made a mistake and said it was a 20 X 8 I meant a 20 X 4. I thought that there was a way to use a 20 X8 L.C.D instead of a standard 16 X 2. My question is is this possible, I thought I (...) (26 years ago, 9-Mar-99, to lugnet.robotics.handyboard)
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| | System time
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Hi, Have anyone developed a system time on the handy board ? Please advice me... Regards, James (26 years ago, 9-Mar-99, to lugnet.robotics.handyboard)
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| | RE: basic trigonometric functions on the handyboard..
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Wouldn't it be easier to just use the cosine function itself? x = cos y You know x, but you want to find y. Pick a y (maybe 45 deg) and calculate the x. Use successive approximation to determine y within a tolerance. Almost like calculating a (...) (26 years ago, 9-Mar-99, to lugnet.robotics.handyboard)
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| | Re: Polaroid 6500 Sonar Problem
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I would also like to know about this. please respond. =) chen (...) (26 years ago, 9-Mar-99, to lugnet.robotics.handyboard)
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| | Re: HB v1.2, IC v3.1 and ir functionality
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Thanx for the pointer. I got it working with some help from this list. Thanx again, Ed (26 years ago, 9-Mar-99, to lugnet.robotics.handyboard)
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| | basic trigonometric functions on the handyboard..
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Hi. We've been trying to build an algorithm which will allow our HB to travel between given points. We need to use the inverse cosine function (cos^-1), how can we do that? Is there a math library which contains this and other trig functions? (...) (26 years ago, 9-Mar-99, to lugnet.robotics.handyboard)
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| | Interfacing HB with bus abaco.
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Do anyone of you have already used a strange bus called ABACO ? I'd like to know if someone of you met it anywhere. Thanks Stefano Falconetti (26 years ago, 9-Mar-99, to lugnet.robotics.handyboard)
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| | Fw: Rs422/485 to RS 232 interface
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---...--- (...) (26 years ago, 9-Mar-99, to lugnet.robotics.handyboard)
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| | Rs422/485 to RS 232 interface
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Does anyone can suggest me where to find a simple scheme of an interface from Rs422/485 to RS 232 ? I know that a lot of them are on the web, but where exactly ? Thanks Stefano Falconetti (26 years ago, 9-Mar-99, to lugnet.robotics.handyboard)
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| | RE: Polaroid 6500 Sonar Problem
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Hi, On this page ((URL) says to install a .1uF capacitor at C7 on the sonar board. My team basically did everything you are talking about, plus install the cap, and everything seems to work fine for us... hope this helps, I'm not sure what the (...) (26 years ago, 9-Mar-99, to lugnet.robotics.handyboard)
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| | Re: basic trigonometric functions on the handyboard..
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A lookup table will be much faster if you can afford the memory space. -----Original Message----- From: Guy & Gad Berg <gberg@netvision.net.il> To: handyboard@media.mit.edu <handyboard@media.mit.edu> Date: Tuesday, March 09, 1999 3:21 AM Subject: (...) (26 years ago, 9-Mar-99, to lugnet.robotics.handyboard)
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| | Polaroid 6500 Sonar Problem
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I'm having difficulty getting my sonar rangefinder to work properly. I've got a fully operational Handy Board with a fully operational Expansion Board plugged into it (both purchased assembled from Gleason and used extensively already without (...) (26 years ago, 9-Mar-99, to lugnet.robotics.handyboard)
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| | Sharp GP2D05?
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hello anyone tried interfacing the Sharp GP2D05 sensors to the handyboard before? i'm thinking of buying some as i need a reliable and cheap digital(Yes/No) sensor. from what i can understand, there are 4 wires, Vin, Vcc, Gnd and Vout. the Vcc, Gnd (...) (26 years ago, 9-Mar-99, to lugnet.robotics.handyboard)
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| | Re: nonvolatile memory
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(...) Try Dallas Semiconductor. Curt Mills, WE7U hacker.NO_*SPAM@tc.fluke.com Senior Methods Engineer/SysAdmin "Lotto: A tax on people who are bad at math." -- unknown "Windows: Microsoft's tax on computer illiterates." -- WE7U (26 years ago, 8-Mar-99, to lugnet.robotics.handyboard)
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| | Re: nonvolatile memory
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(...) Actually the DS1225Y is a 8Kx8 NVRAM chip. The correct Dallas part for the HB is a DS1230. Another option is the Simtek EEPROM backed (no battery) chips. They have the same package as a standard RAM chip, whereas the higher profile Dallas (...) (26 years ago, 8-Mar-99, to lugnet.robotics.handyboard)
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| | Re: nonvolatile memory
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You need to either 1. build a battery circuit that connects to the power pins of the memory chip or 2. Buy nonvolatile memory -phil (...) (26 years ago, 8-Mar-99, to lugnet.robotics.handyboard)
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| | Re: nonvolatile memory
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(...) You can get a RAM Module with built-in battery. Don't remember the name but they are out there. (...) ---...--- Shoot-to-Win Protect the 2nd Amendment ---...--- (26 years ago, 8-Mar-99, to lugnet.robotics.handyboard)
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| | Re: nonvolatile memory
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Just a thought, you could try one of Dallas Semiconductor's nonvolatile SRAM such as the DS1225Y Cheers, Ranjit (...) -- Ranjit Diol - COMPSys Dowagiac,Michigan e-mail: rsdiol@mich.com website: (URL) (26 years ago, 8-Mar-99, to lugnet.robotics.handyboard)
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| | nonvolatile memory
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Does Anyone know how to modify the handy board so that when the battery is disconnected the memory on the board is not lost? In short I want the HB to have nonvolatile memory so that I do not have to reload the pcode in bootstrap mode every time the (...) (26 years ago, 8-Mar-99, to lugnet.robotics.handyboard)
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| | HB & unmanned vehicle system
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Hi, can anyone help me in devolping an unmanned ground vehicle system using a Hand Board? This is my first experience with the HB, in fact, I'm actually buying it (sorry, but may be you can also tell me where to by one by the internet and what to (...) (26 years ago, 8-Mar-99, to lugnet.robotics.handyboard)
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| | 20 X 8 L.C.D driver?
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I have seen questions on the list about using a 20 X 8 instead of a 16 X 4 lcd, I think that the person was told to look on the handy board site for a 20 X 8 driver. has anybody used a 20 X8 lcd and if so how did you do it and could you help me use (...) (26 years ago, 8-Mar-99, to lugnet.robotics.handyboard)
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| | Serial Routines
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Hi, I have the following questions: I want to transmit data by a radio comunication beetween HB and PC (only HB to PC right know) using the pa7 and a one-way wireless link from Conrad Electronics (german electronic reseller). Do i need the pa7_9600 (...) (26 years ago, 8-Mar-99, to lugnet.robotics.handyboard)
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| | RE: Sharp GP2D05?
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I have used the Sharp GP2D05 with the Handy Board and found it to be extremely simple to use. It is easy to control in either IC or in assembly language and easy to adjust for range. There is a tiny potentiometer on the back of the unit that you (...) (26 years ago, 8-Mar-99, to lugnet.robotics.handyboard)
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| | Re: Java and 68hc11
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Thanks, I downloaded all, and now i'm trying to make it run. Very, very interesting... ---...--- From: Pierre Deprost <Pierre.Deprost@Advalvas.be> To: Stefano Falconetti <falconetti@sigma.it> Subject: Re: Java and 68hc11 Date: 03 March 1999 22:20 (...) (26 years ago, 8-Mar-99, to lugnet.robotics.handyboard)
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| | RE: Sharp GP2D02 code available
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Terry, Understand that the GP2D05 is a different device than the GP2D02. For the '05' you can set a analog threshold and the digital output read 1 or 0 depending whether the distance is according to this set threshold. The '02' device has a real (...) (26 years ago, 8-Mar-99, to lugnet.robotics.handyboard)
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| | Are GP2D02 available in Australia
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Hi all, Can anybody tell me from where I can get GP2D02 in Australia. Sincerely Javaid Iqbal (26 years ago, 8-Mar-99, to lugnet.robotics.handyboard)
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| | Re: Sharp GP2D02 code available
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I just finished sending a question to the mail list but may have my problem fixed? Just from blind luck. I have digital out #7no the expansion board and digital in#15 on the main board and the first of the zeros on on the LCD changes to a one at (...) (26 years ago, 8-Mar-99, to lugnet.robotics.handyboard)
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| | Re: Sharp GP2D02 code available
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Hi Barry, I have a GP2D05 from Acroname Inc., Have wired as per instructions black for gnd., green for Vin, Yellow for Vout, and red for Vcc.The pin outs are different than the GP2D02. Then installed the diode and connectors for the handyboard .as (...) (26 years ago, 8-Mar-99, to lugnet.robotics.handyboard)
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| | stepper motors
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Hi : I am looking for a stepper motor that works at 7V. I was wondering if any of you have used stepper motors for the handyboard or the Rug Warrior. If so, what model did you use and what was your selection criterion for the motors. Thanks. (26 years ago, 7-Mar-99, to lugnet.robotics.handyboard)
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| | Re: Where do I get Sharp GD sensors
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I ordered mine from Acroname Inc. for $19.00. They also have sample code provided by Gary Livick. I haven't connected it to the handyboard as or this time but will be intersted to know how everyone else is doing it. Mine is a model GP2D02. Good Luck (...) (26 years ago, 6-Mar-99, to lugnet.robotics.handyboard)
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